Kyle's mom has a fecal transplant and the boys are on a quest for the best microbiome.
Guest Cast
Trey Parker
voices Mr. Mackey
Mona Marshall
voices Sheila Broflovski
Mona Marshall
voices Linda Stotch
Trey Parker
voices Harrison Yates
April Stewart
voices Harriet BiggleCast Appearances
Trey Parker
voices Stan Marsh
Matt Stone
voices Kyle Broflovski
Trey Parker
voices Eric Theodore Cartman
Matt Stone
voices Kenny McKormickEpisode Discussion
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